Table 2.

Demographic and clinical characteristics of study cohort

Characteristics	BAVM cases		Controls		p value
	n	%	n	%
Total participants (n = 462)	216	46.8	246	53.3
Mean age ± SD, years	39 ± 17.6		31 ± 5.7		<0.01
Sex					0.63
Women	119	55.1	141	57.3
Men	97	44.9	105	42.7
Initial presentation			N/A	N/A
Nonhemorrhagic	133	61.6
Hemorrhagic	83	38.4
BAVM size ± SD, cm	2.9 ± 1.5		N/A	N/A
Venous drainage			N/A	N/A
Superficial only	98	53.6
Any deep	85	46.4

N/A = Not applicable. p value: t test for continuous (presented as mean 8 standard deviation) and χ² test for categorical variables.